What a lot of people don't realise is that just because it's a Bicycle deck doesn't mean everyone instantly knows that it's not a trick deck or something. To a layman, any deck you pull out will be a little suspicious. If you do something that blows their mind, it'll raise that suspicion. The only way to guarantee that a layman won't suspect anything is if you use their deck.
But just for the sake of the thread, the greatest cards in magic are playing cards... Tarot cards work for some effects but I reckon playing cards are much more workable...